Merge branch 'hn/bisect-reset-when-found' into next

The 'git bisect' command has been taught a
'--reset-when-found[=<where>]' option that tells the command to
automatically run 'git bisect reset' to jump back to the original
state or to the found culprit.

* hn/bisect-reset-when-found:
  bisect: add --reset-when-found to leave when done
  bisect: let bisect_reset() optionally check out quietly

diff --cc builtin/bisect.c
Simple merge

diff --cc t/t6030-bisect-porcelain.sh
Simple merge